http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_finding_key_properties_of_nearby_stars.html
Chapter
1. Finding Key Properties of Nearby Stars
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http://digfir-published.macmillanusa.com/astro_interactive_exercise/ie_finding_key_properties_of_nearby_stars_dlap.xmlDLAP questions51406764b11c0f6c0b000000